2004 JEEP WRANGLER check oil

If you notice a change in the sound of the exhaust system;
or if the exhaust fumes can be detected inside the vehicle;
or when the underside or rear of the vehicle is damaged;
have an authorized technician inspect the complete ex-
haust system and adjacent body areas for broken, dam-
aged, deteriorated, or mispositioned parts. Open seams
or loose connections could permit exhaust fumes to seep
into the passenger compartment. In addition, inspect the
exhaust system each time the vehicle is raised for lubri-
cation or oil change. Replace as required.
Cooling System
WARNING!
You or others can be badly burned by hot coolant or
steam from your radiator. If you see or hear steam
coming from under the hood, don't open the hood
until the radiator has had time to cool. Never try to
open a cooling system pressure cap when the radia-
tor or coolant bottle is hot.
Coolant Checks
Check coolant protection every 12 months (before the
onset of freezing weather, where applicable). If coolant is
dirty or rusty in appearance, the system should be
drained, flushed and refilled with fresh coolant.
Check the front of the radiator for any accumulation of
bugs, leaves, etc. Clean the radiator by gently spraying
water from a garden hose at the back of the core.
Check the engine cooling system hoses for condition and
tightness of connection. Inspect the entire system for
leaks. Any hoses that show cuts or severe abrasion must
be replaced.
Cooling System Ð Drain, Flush, And Refill
At the intervals shown in the appropriate ªMaintenance
Schedule,º the system should be drained, flushed, and
refilled.
If the solution is dirty and contains a considerable
amount of sediment, clean and flush with reliable cooling
system cleaner. Follow with a thorough rinsing to remove
all deposits and chemicals.
MAINTAINING YOUR VEHICLE 239
7

WARNING!
Worn brake hoses can burst and cause brake failure.
You could have an accident. If you see any signs of
cracking, scuffing, or worn spots, have the brake
hoses replaced immediately.
Brake Master Cylinder
The fluid level in the master cylinder should be checked
when performing under hood services, or immediately if
the BRAKE warning light shows system failureBe sure to clean the top of the master cylinder area before
removing the cap. If necessary, add fluid to bring the
fluid level up to the requirements described on the brake
fluid reservoir. With disc brakes, fluid level can be
expected to fall as the brake pads wear. Brake fluid level
should be checked when pads are replaced. However,
low fluid level may be caused by a leak and a checkup
may be needed.
Use only manufacturer's recommended brake fluid, refer
to Recommended Fluids, Lubricants, and Genuine Parts
for correct fluid type.
WARNING!
²Use of a brake fluid that may have a lower initial
boiling point or unidentified as to specification,
may result in sudden brake failure during hard
prolonged braking. You could have an accident.
²Overfilling the brake fluid reservoir can result in
spilling brake fluid on hot engine parts and the
brake fluid catching fire.
244 MAINTAINING YOUR VEHICLE

2. The engine should be running at curb idle speed for a
minimum of 60 seconds.
3. Fully apply parking brake.
4. Apply the brakes and shift the transmission into P
(Park).
5. The fluidMUSTbe checked with the transmission in
P (Park) to be sure that the fluid level is accurate.
6. Wipe the dipstick clean and reinsert until seated.
Remove dipstick and note reading.
At normal operating temperature (approximately 180É F
(82É C), the fluid level is correct if it is in the HOT region
(cross-hatched area) on the oil level indicator. The fluid
level indicator should be in the COLD region at 70É F (21É
C) fluid temperature.
If the fluid level is low, add sufficient fluid to bring to the
proper level. Refer to Recommended Fluids, Lubricants
and Genuine Parts for correct fluid type.
Fluid is added through the dipstick tube.NOTE:To prevent dirt and water from entering the
transmission after checking or replenishing fluid, make
certain that the dipstick cap is properly reseated.
Special Additives
The manufacturer strongly recommends against the ad-
dition of any additives to the transmission. The only
exception to this policy is the use of special dyes to aid in
detecting fluid leaks. The use of transmission sealers
should be avoided as they may adversely affect seals.
Hydraulic Clutch Fluid Ð Manual Transmission
The clutch hydraulic system is a sealed maintenance free
system. In the event of leakage or other malfunction, the
system must be replaced.
Manual Transmission
Selection of Lubricant
Use only manufacturer's recommended manual trans-
mission fluid, refer to Recommended Fluids, Lubricants,
and Genuine Parts for correct fluid type.
246 MAINTAINING YOUR VEHICLE

CAUTION!
When replacing plugs, do not overtighten. You could
damage them and cause them to leak.
Selection of Lubricant
Use only manufacturer's recommended fluid, refer to
Recommended Fluids, Lubricants, and Genuine Parts for
correct fluid type.
Front/Rear Axle FluidFluid Level Check
Lubricant should be at bottom edge of the oil fill hole.
Adding Fluid
Add lubricant only at the fill hole and only to the level
specified above.
Selection of Lubricant
Use only manufacturer's recommended fluid, refer to
Recommended Fluids, Lubricants, and Genuine Parts for
correct fluid type.
Appearance Care And Protection From Corrosion
Protection Of Body And Paint From Corrosion
Vehicle body care requirements vary according to geo-
graphic locations and usage. Chemicals that make roads
passable in snow and ice, and those that are sprayed on
trees and road surfaces during other seasons, are highly
corrosive to the metal in your vehicle. Outside parking,
which exposes your vehicle to airborne contaminants,
road surfaces on which the vehicle is operated, extreme
hot or cold weather and other extreme conditions will
have an adverse effect on paint, metal trim, and under-
body protection.
248 MAINTAINING YOUR VEHICLE

NOTE:Most vehicles are operated under the conditions
listed for Schedule ªB.º
Second is ScheduleªAº. It is for vehicles that are not
operated under any of the conditions listed under Sched-
ule ªB.º
Use the schedule that best describes your driving condi-
tions. Where time and mileage are listed, follow the
interval that occurs first.
CAUTION!
Failure to perform the required maintenance items
may result in damage to the vehicle.
At Each Stop for Fuel
²
Check the engine oil level about 5 minutes after a fully
warmed engine is shut off. Checking the oil level while
the vehicle is on level ground will improve the accu-
racy of the oil level reading. Add oil only when the
level is at or below the ADD or MIN mark.
²Check the windshield washer solvent, add as required.
Once a Month
²
Check the tire pressure and look for unusual wear or
damage.
²Inspect the battery and clean and tighten the terminals
as required.
²Check the fluid levels of the coolant reservoir, brake
master cylinder, and transmission, and add as needed.
²Check all lights and all other electrical items for correct
operation.
At Each Oil Change
²
Change the engine oil filter.
²Inspect the exhaust system.
²Inspect brake hoses.
²Check the coolant level, hoses, and clamps.
²Inspect manual transmission fluid level Ð if
equipped.
MAINTENANCE SCHEDULES 263
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Coolant Temperature Gauge............. 118
Engine Oil Pressure Gauge.............. 117
Jacking............................. 211
Jump Starting........................ 216
Emission Control System Maintenance....226,262
Engine
Air Cleaner.......................... 234
Block Heater......................... 162
Break-In Recommendations............... 39
Compartment........................ 224
Exhaust Gas Caution................... 40
Fails to Start......................... 161
Flooded, Starting..................... 161
Fuel Requirements.................197,258
Jump Starting........................ 216
Oil .............................228,258
Oil Disposal......................... 231
Oil Filter............................ 231
Oil Pressure Gauge.................... 117
Oil Selection......................... 258
Overheating......................... 210
Starting............................ 160
Temperature Gauge.................... 118Engine Oil Viscosity Chart................ 230
Entry System, Illuminated................. 15
Exhaust Gas Caution..................... 40
Exhaust System........................ 238
Extender, Seat Belt....................... 21
Exterior Finish Care..................... 249
Fabric Care........................250,252
Fabric Top............................ 250
Filters
Air Cleaner.......................... 234
Engine Fuel......................... 234
Engine Oil.......................... 231
Finish Care........................... 249
Flashers
Hazard Warning...................... 210
Turn Signal.......................... 116
Flooded Engine Starting.................. 161
Fluid Capacities........................ 258
Fluid Level Checks...................... 248
Automatic Transmission................ 245
Engine Oil.......................... 228
Manual Transmission.................. 247
INDEX 291
10

Rear Window Defroster.................. 154
Rear Window Features................... 154
Rear Wiper/Washer..................... 155
Rearview Mirrors........................ 46
Reclining Front Seats..................... 50
Recommended Fluids, Lubricants and Genuine
Parts............................... 259
Recreational Towing..................... 205
Shifting into Transfer Case Neutral (N)..... 205
Shifting out of Transfer Case Neutral (N) . . . 206
Reformulated Gasoline................... 198
Refrigerant............................ 236
Release, Hood.......................... 55
Reminder, Lights On..................... 57
Replacement Bulbs...................... 257
Replacement Keys....................... 13
Replacement Parts...................... 227
Replacement Tires...................... 194
Reporting Safety Defects................. 284
Restraints, Child........................ 29
Restraints, Occupant..................... 16
Rotation, Tires......................... 196Safety Checks Inside Vehicle............... 41
Safety Checks Outside Vehicle.............. 41
Safety Defects, Reporting................. 284
Safety Information, Tire.................. 184
Safety Tips............................. 40
Satellite Radio......................... 145
Satellite Radio Antenna.................. 147
Schedule, Maintenance................... 262
Seat Belts.............................. 17
Adjustable Upper Shoulder Anchorage...... 21
And Pregnant Women.................. 21
Child Restraint......................29,36
Extender............................ 21
Front Seat............................ 17
Reminder........................... 117
Seats................................. 50
Adjustment.......................... 50
Rear Folding......................... 52
Rear Seat Cushion Removal.............. 53
Reclining............................ 50
Tilting.............................. 51
Selection of Oil........................ 230
296 INDEX